Bun coring machine



Sept. 29, 1942. J. D. McDoNALD BUN coRING MAcHINE Filed Dec. 24, 1941 3Shee'cs-Sheerl 1 Sept 29, 1942. J. D. McDoNYALD BUN' CQRING MACHINEFiled Dec. 24,1941 3 Sheets-Shea# 2 sept.- 29, 1942.

J. D. McDoNALD BUN CORINYGr MACHINE Filed DSC. 24, 1941 s sheets-smeet sPatented Sept. 29, 19424 yUlysu'rlao ASTAT BUN- CORING A Jesse 1D.McDonald, Enid, Okla., assignor of one- `third to John E. Thomas,Enid,.0kla.

Application December 24, 1941, serial No; 424,355

8 Claims.

plished by reference to the accompanying drawings. l

Figure 1 is a side elevation partly in longitudinal section, showing oneform of the invention. Figure 2 is a transverse sectional view on line l2-2 0f Fig. 1.

Figure 3 is an enlarged side elevation of the core-removing member. i

Figure 4 is a view -similar to Fig. 3 but taken at right angles thereto.4

Figures 5 and 6 are further enlarged longitudinal sectional views asindicated by lines 5-5 and 6-6 of Fig. 3.

Figure 'l is a transverse sectional view on line l-l of Fig. 5.

Fig. 8 is a transverse section on line 8-8 of Fig. 6.

Figure 9 is a view similar to Fig. 1 but showing a dierent construction.

Figure 10 is anenlarged fragmentary side elevation partly in sectionshowing the core-removing member which is illustrated in elevation,primarily, in Fig. 9.

Figure 11 is an end elevation of the core-removing member shown inFig's. 9 and 10.

The construction shown in Figs. 1 to 8 will rst be described.

I have disclosed an electricl motor I2 mounted on one end of lanelongated base I3, said motor having a short projecting shaft I4 and arigid boss I5 surrounding said shaft. Surrounding this boss, is theinner end of a bun guiding sleeve I6 which-is preferably of cylindricalform, said sleeve being secured tothe boss l5 in concentric relationwitl/L the shaft' I4, by means of set screws Il threadedthrough saidsleeve and abutting said boss. Toward its outer end, the sleeve I6 issupported by a suitable bracket I8 secured to the base I3. The outer end-of the sleeve I6 is open to permit pushing of an elongated bun intosaid sleeve for core-removing purposes, as hereinafter explained, and topermit the discharge of crumbs removed from the bun, the lower side ofsaid sleeve I6 is formed with an opening I9. A lpan or other suitablereceptacle,

P may be placed on the base Il under the opening I9 to receive thedischargedcrumbs.-

Disposed centrally and longitudinally within the sleeve I6,is` acore-removing member 20 formed primarily from an elongated metal tube ofcylindrical form. Secured within the inner end of this member 20 is abushing 2| to snugly surround the motor shaft I4, a set screw 22 beingemployed to lock the member 2li-and the bushing to said shaft, The outerend of the member 20 is open and is spaced inwardly to some extent fromthe outer end of the sleeve IB, and said outer end of said member 20 isformed with a plurality of circumferentially spaced cutting teeth 23which cut the bun to form a smoothwalled bore therein. 'This frontend ofthe member `2li is also provided with two substantially radial prongs orteeth 2l which project into its interior and serve to break up thecore-being removed from the bun, -into small pieces or crumbs. Forfeeding these crumbs inwardly and discharging them through the'openingI9, the tube of which member 20 is formed, is provided with a slowlypitched helical groove 25, the edges of which act as a screw conveyor toinwardly feed the crumbs. For turning these crumbs from the interior ofthe tube to the exterior thereof,

vsaid tube is provided with a diagonal partition plate 26.

With the motor I2 running and therefore driving the core-removing member20, an elongated bun or the like is pushed into the outer end of thesleeve I6, causing said member to form a bore in the bun, disintegratethe core within this bore, and discharge the crumbs through the openingI9, the bun being then in readiness to receive a hot dog, with desiredrelish or other seasoning, or to receive any desired edible stulng.

In Figs. 9, 10 and 11, a somewhat different con.- struction is shown.The electric motor I2l is provided with a tubular projecting boss I5'around its shaft Il'. The sleeve I6' is mounted by means of set screwsIl'f'and a bracket Ill'|` and is formed with a discharge opening I9. Asocket 2|' on the inner end of a core-removing member 20', is securedupon the shaft Il' by means of a set screw 22', openings for givingaccess to screw, being shown at 25.

The member 20 comprises a screw conveyor having a central stem 21 and ahelical web 28, together with a ring 29 surrounding and secured to theouter end of said web 28. The ring and web are preferably weldedtogether as indicated aid ser A ring is provided with circmnferentiallyspaced cutting teeth 3| to act upon the bun. Y A fixed tube 32 surroundsthe conveyor screw zi-zs and is secured in the mbuiar boss le' by meansof a set screw 33, and if desired, an opening 3l may be formed in thesleeve it' to give access to said'set screw 33. The lower portionofthetubenisformed withano Il directly over the opening l" of the si eIi'..

Whenabunispushedintothesleeve itbe teethiicutaboreintbebmthescrewconveyor 21-28 feeds all the crumbs inwardly, andthesecrumbsdischargethrougbtheopenirm and |9'. The tube 32 prevents thecrumbsfrom having any rubbing action upon the side wall oftheboreastheyarebeingfedrearwardlyand thus prevent said crumbs fromeither wearing Aaway said wall to an undesired extent, or packinginstead of en'ectively discharging.

In Fig. 9, I have illustrated a notch 3l in the outer end of the sleeveIl'. Y a corresponding notch in the side wall of the sleeve which is cutoif in this view. The two notches permit the operator-to grip the end of'at 30 in Figs. 10 and 11. The outer edge 0f this screw and a ringsurrounding and secured to the4 frontend of said screw, the outer orfront edge of said ring having circumferentially spaced teeth: the webof said screw constituting said helical means: said teeth ,constitutingsaid cut- 4.Astnictureasspecinedinc1aim1;said

coreremoving member comprising a` conveyor substantiallyabuttingrelation with the inner v edge of said ring, said fixed tubehaving a crumb discharge opening Lnear said. opening of. said There isof course the bun when inserting it to the desired distance and alloweasy removal. This detail could of course be embodied in Fig. 1 also, ifdesired.

From the foregoing taken in connection with the accompanying drawings,it will be seen that novel and advantageous provision has been madeforcarryins out the object of the invention. Ii-Iowever,V within thescope of the invention as claimed, variations may be made. f Y

I claim:

1. A bun coring machine comprising a support anda short driven shaftprojecting therefrom, a bun-guiding sleeve concentric with said shaftand of a diameter to receive and contact with a bun or the like to becored, said sleeve'having an inner end secured to said support, theouter -end of said sleeve being open to permit pushing of a hand-heldbun or the like intosaid sleeve, and

a core-removing member secured to said shaft' and disposedlongitudinally within said sleeve, said bun-guiding sleeve and saidcore-removing member being xed against longitudinal move.

ment with respect to each other, said coreremoving member having meansat its outer end for cutting a. cylindrical bore in the bun as thelatter is pushedV into said sleeve, said coreremoving member also havinghelical means extending longitudinallythereof for feeding the removedcrumbs from said bore toward said support, the bottom of said sleevehaving an opening near said support through which said crumbs aredischarged by gravity.

2. A structure as specified inv claim l; said core-removing membercomprising -a cylindrical tube, said cutting means consisting ofcircumferentially spaced teeth on the outer end of said tube, said tubehaving a helical slot, the edges of which constitute said helical means.

core-removing member comprising. a conveyorscrewandaringsurroundingandsecuredto the vfrontend .of said screw, theouter .or front edge of said ring having circumferentially spaced teeth:the web of said screw. constituting said helical means; said teethconstituting said cutting means: anda ilxed tube said conveyor screw andhaving its outer end -in aring surroundingandsecuredtothe other end ofsaid screw, the outer edge of said ring having `circumferentially spacedcuttingteeth. Y l 7. A structure as speciiled in claim 6; and a fixedtube surrounding said screw and having an e end in substantiallyabutting relation with the inner edge of said ring, said fixed tubehaving an opening near its other end from its interior to its exterior.

8. A bun coring machine comprising a base, a motor secured upon one endof said base and having an outwardly projecting bearing bossV disposedtoward'the other end of said base, said motor being provided with ashaft concentric with said bearing boss, a horizontal bun-guiding tubedisposed horizontally over said base and having an inner end surroundingsaid bearing bossthe outer end of said tube being open to receive a bunto be cored, radial set screws threaded through said inner end of saidtube and abutting said bearing boss to secure and center said inner endof said tube, a 'supporting bracket for said outer end of said tube,said bracket being secured to said base and to said tube, andv buncoringmeans disposed centrally within said tube and secured to said shaft,said'bun-coring means including means for feeding the crumbs toward -theinnerY end of said tube. the bottom of said JESSE D. Mcp'oNAm.

5. In a machine of the class described, a core-

